Daitō (大東町 Daitō-chō) was a town located in Ōhara District, Shimane, Japan.
On November 1, 2004 Daitō was merged with the towns of Kamo and Kisuki, all from Ōhara District, the towns of Kakeya and Mitoya, and the village of Yoshida, all from Iishi District, to form the new city of Unnan.
As of 2003, the town had an estimated population of 14,327 and a density of 94.11 persons per km². The total area was 152.23 km².
The town's sister city is Richmond, Indiana, USA.